Essential cleaning for a neglected heat pump in Rosemont
At AirGreen , we know that regular maintenance is key to extending the lifespan of a heating, ventilation, and air conditioning (HVAC) system. In Rosemont–La Petite-Patrie, we were recently called in for a complete cleaning of an outdoor wall-mounted heat pump installed on the rear facade of a Montreal brick duplex. This unit, visibly dirty, was showing clear signs of wear and tear—a typical case of a lack of seasonal maintenance.
Diagnosis: an outdoor unit saturated with dirt
Upon our arrival, we noticed several alarming signs:
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Fan grille covered in dust and rust .
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Accumulation of plant debris and urban particles partially blocking airflow.
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Oxidized moisture stains at the base of the case.
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Noisy and slow fan , a consequence of prolonged fouling.
The customer explained that the heat pump was no longer able to maintain a stable indoor temperature and that the electricity bill had increased significantly. These symptoms are typical of an HVAC system with a clogged condenser and fins .
Securing and preparing the construction site
Before any intervention, we cut off the power supply and secured the area to prevent any splashing of water or product on nearby electrical components, such as the meter and distribution box.
Our technician then installed a protective tarp to prevent splashes on the brick wall and the adjacent window.
A quick inspection of the piping and condensation drain confirmed that there were no major leaks, but a slight limescale deposit was visible at the pipe outlet.
Cleaning the condenser and fins
The first step in the cleaning process was to clear the condenser using a soft brush and a compressed air blower.
Next, we applied a biodegradable cleaner specifically designed for aluminum HVAC surfaces. This product works deep down to dissolve grease and organic deposits without damaging the fins.
After ten minutes of exposure, we carried out a low-pressure rinse with lukewarm water, removing all traces of dirt and pollution.
The result was immediate: the fins regained their metallic shine and the fan could once again rotate freely.
Details of the mechanical and aesthetic cleaning
The fan was disassembled for targeted cleaning of the blades, which were particularly dirty.
We used an environmentally friendly degreasing solution , followed by rinsing with a microfiber cloth to prevent any corrosion.
The outer hood was also hand-washed and then treated with an antistatic protective coating , limiting dust adhesion.
Finally, the bottom of the case , which showed signs of rust, was cleaned and then treated with a transparent anti-corrosion product , extending the life of the sheet metal.
Post-cleaning checks
Once everything was dry and reconnected, we carried out a complete functional check :
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Stable and quiet ventilation cycle .
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Noticeable improvement in airflow .
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20% reduction in operating noise .
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Expelled air temperature conforms to manufacturer's standards .
The customer immediately noticed a more powerful airflow and improved thermal comfort , especially at low outside temperatures.
Why regular HVAC maintenance is essential
An outdoor unit exposed to Montreal's urban conditions — dust, rain, pollution and vegetation — quickly accumulates residues that impair its performance.
Without regular cleaning, the heat pump consumes more energy , cools less efficiently and risks premature compressor failure .
At AirGreen , we recommend:
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A complete cleaning every year , in spring or autumn.
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A visual inspection of the ducts and filters every three months.
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The use of environmentally friendly products and safe procedures , always in accordance with the manufacturers' recommendations.
AirGreen: your trusted partner in Montreal and on the South Shore
Our team of experts operates throughout Greater Montreal , including Rosemont, Laval, Longueuil, the North Shore and the South Shore .
We are recognized for our technical rigor , our respect for RBQ standards , and our approach focused on the sustainability of HVAC installations .
Each cleaning is documented, verified and carried out with specialized tools to guarantee optimal results, without compromising the integrity of the system.
In conclusion
This intervention in Rosemont–La Petite-Patrie perfectly illustrates the difference that professional wall-mounted heat pump cleaning can make.
In just a few hours, the customer's heat pump went from a noisy and worn-out appliance to a high-performing, quiet, and energy-efficient system .
At AirGreen , we do much more than just cleaning: we bring your comfort back to life.